IEC 61020-4-2-1995
电子设备用机电开关 第4部分:杠杆(钮子)开关的分规范 第2节:电气最高交流电压为227V、最高直流电压为30V、最大电流为20A的一极、二极、四极密封杠杆(钮子)开关详细规范
Electromechanical switches for use in electronic equipment - Part 4: Sectional specification for lever (toggle) switches - Section 2: Detail specification for one pole, two pole, four pole, sealed lever (toggle) switches, 277 V a.c. maximum, 30 V d.c. max